This one has plenty of variations for enemy placement... I think getting the left side T-72 counter (as opposed to the one far right over the ridge) is best, but it seems a lot rarer than the right side one. Furthermore the right side T-72 arrival time seems very inconsistent. All I am certain of is that they will never appear before taking BP Alpha, but how long exactly it will take between that and them showing up on the ridge seems to vary for some reason.

The other setups were really good too: Only 2 BMPs (I think it can be up to 4), and without overlapping fields of fire The ATGM down on the left right next to the BMP (as opposed to up top center right, requiring more time to change targets and giving overlapping fields of fire with at least one other BMP) Only 1 defensive T-72 (there should be at least 3 other T-72 positions, I think all of them can theoretically be active at a time but I am not sure I have seen more than 3 at once) The forward position for the BRDMs (they can also spawn between the buildings on Yellow, hence the arty - this is also why I tell my plt to hold on the crest so they can cover the 2 T-72 counter positions in case I have to go into the valley where I can't)

Maybe there is an ever better config or strats that work even better with the other setups, but I can't say I've seen one. I only managed to get one other sub-3, which also had the left side counter.